Light-emitting apparatus

1. A light-emitting apparatus comprising: a storage case that includes a base board having a concave portion and a lid portion covering the concave portion; and a plurality of light-emitting elements that are disposed on an inner surface of the case, wherein an opening is formed in the lid portion, a plurality of cavities that are branched from the position directly underneath the opening are formed in the case, an inner surface of each of the cavities is a light-reflecting surface and is constituted of a parabolic surface and a flat surface opposing the parabolic surface, a focal position of the parabolic surface is positioned on the flat surface, respective ones of the plurality of light-emitting elements are disposed at the focal positions of respective ones of the plurality of cavities, the light-reflecting surface guides light emitted by the light-emitting elements as light sources to a position directly underneath the opening, a reflecting portion is formed directly underneath the opening so as to reflect the light emitted by the light-emitting elements toward the opening, and a front end portion of the reflecting portion is disposed near the opening.

2. The light-emitting apparatus according to claim 1 , wherein, in a cross section of the light-emitting apparatus that is taken along at least one of the light-emitting elements and the reflecting portion in a direction perpendicular to a bottom surface of the base board, a cross-sectional shape of a part of the light-reflecting surface is a substantial parabola that spreads out toward the reflecting portion, and the at least one of the light-emitting elements is disposed at a substantial focal position of the parabola.

3. The light-emitting apparatus according to claim 1 , further comprising a wavelength converting portion that contains a wavelength converting material for converting a wavelength of the light from the light-emitting elements, in at least a part of an optical path between the light-emitting elements and the opening inside the case.

4. The light-emitting apparatus according to claim 1 , further comprising a wavelength converting portion that contains a wavelength converting material for converting a wavelength of the light from the light-emitting elements, in at least a part of an optical path between the light-emitting elements and the opening inside the case, wherein the plurality of the light-emitting elements respectively are disposed on at least one substantial concentric circle whose center is the opening.

5. The light-emitting apparatus according to claim 1 , wherein at least a part of the inner surface comprises a wavelength converting portion that contains a wavelength converting material for converting a wavelength of the light from the light-emitting elements.

6. The light-emitting apparatus according to claim 1 , further comprising a wavelength converting portion for converting a wavelength of the light from the light-emitting elements in or near the opening.

7. The light-emitting apparatus according to claim 6 , wherein the wavelength converting portion is formed to have a dome shape.

8. The light-emitting apparatus according to claim 1 , wherein the light-reflecting surface spreads out toward the position directly underneath the opening.

9. The light-emitting apparatus according to claim 1 , wherein a material having a refractive index that is higher than a refractive index of other region in the storage case is disposed directly underneath the opening in the case.

10. The light-emitting apparatus according to claim 1 , wherein a surface of the reflecting portion is constituted of the light-reflecting surface that extends toward the opening.

11. The light-emitting apparatus according to claim 1 , wherein the surface of the reflecting portion is constituted of a curved face.

12. The light-emitting apparatus according to claim 1 , wherein at least one of the light-emitting elements is disposed on an inner surface of the lid portion, and the inner surface of the lid portion on which the light-emitting element is disposed is inclined toward a side of the base board with respect to a face of the opening.

13. The light-emitting apparatus according to claim 1 , wherein the plurality of the cavities that are formed in the case are different in size.

14. The light-emitting apparatus according to claim 1 , wherein a plurality of cavities that are branched from the position directly underneath the opening are formed in the case, at least one of the light-emitting elements is provided at an end of each of the cavities on a side of the lid portion, and inner surfaces of the lid portion that face the respective cavities are inclined toward a side of the base board with respect to a face of the opening, and inclined angles toward the side of the base board are different according to the respective cavities.

15. The light-emitting apparatus according to claim 1 , wherein an area of the opening ranges from 3% to 30% of an area of the lid portion.

16. A light-emitting apparatus comprising: a storage case that includes a base board having a concave portion and a lid portion covering the concave portion; and a plurality of light-emitting elements that are disposed on an inner surface of the case, wherein an opening is formed in the lid portion, a plurality of cavities that are branched from the position directly underneath the opening are formed in the case, an inner surface of each of the cavities is a light-reflecting surface and is constituted of an ellipse surface and a flat surface opposing the ellipse surface, a focal position of the ellipse surface is positioned on the flat surface, respective ones of the plurality of light-emitting elements are disposed at the focal positions of respective ones of the plurality of cavities, the light-reflecting surface guides light emitted by the light-emitting elements as light sources to a position directly underneath the opening, and a reflecting portion is formed directly underneath the opening so as to reflect the light emitted by the light-emitting elements toward the opening.

17. The light-emitting apparatus according to claim 16 , wherein, in a cross section of the light-emitting apparatus that is taken along at least one of the light-emitting elements and the reflecting portion in a direction perpendicular to a bottom surface of the base board, a cross-sectional shape of a part of the light-reflecting surface is a substantial ellipse that spreads out toward the reflecting portion, one of focal positions of the substantial ellipse is positioned near the opening, and the at least one of the light-emitting elements is disposed at the other focal position of the ellipse.

18. The light-emitting apparatus according to claim 16 , further comprising a wavelength converting portion that contains a wavelength converting material for converting a wavelength of the light from the light-emitting elements, in at least a part of an optical path between the light-emitting elements and the opening inside the case.

19. The light-emitting apparatus according to claim 16 , further comprising a wavelength converting portion that contains a wavelength converting material for converting a wavelength of the light from the light-emitting elements, in at least a part of an optical path between the light-emitting elements and the opening inside the case, wherein the plurality of the light-emitting elements respectively are disposed on at least one substantial concentric circle whose center is the opening.

20. The light-emitting apparatus according to claim 16 , wherein at least a part of the inner surface comprises a wavelength converting portion that contains a wavelength converting material for converting a wavelength of the light from the light-emitting elements.

21. The light-emitting apparatus according to claim 16 , further comprising a wavelength converting portion for converting a wavelength of the light from the light-emitting elements in or near the opening.

22. The light-emitting apparatus according to claim 16 , wherein the light-reflecting surface spreads out toward the position directly underneath the opening.

23. The light-emitting apparatus according to claim 16 , wherein a material having a refractive index that is higher than a refractive index of other region in the storage case is disposed directly underneath the opening in the case.

24. The light-emitting apparatus according to claim 16 , wherein a surface of the reflecting portion is constituted of the light-reflecting surface that extends toward the opening.

25. The light-emitting apparatus according to claim 16 , wherein the surface of the reflecting portion is constituted of a curved face.

26. The light-emitting apparatus according to claim 16 , wherein at least one of the light-emitting elements is disposed on an inner surface of the lid portion, and the inner surface of the lid portion on which the light-emitting element is disposed is inclined toward a side of the base board with respect to a face of the opening.

27. The light-emitting apparatus according to claim 16 , wherein the plurality of the cavities that are formed in the case are different in size.

28. The light-emitting apparatus according to claim 16 , wherein a plurality of cavities that are branched from the position directly underneath the opening are formed in the case, at least one of the light-emitting elements is provided at an end of each of the cavities on a side of the lid portion, and inner surfaces of the lid portion that face the respective cavities are inclined toward a side of the base board with respect to a face of the opening, and inclined angles toward the side of the base board are different according to the respective cavities.

29. The light-emitting apparatus according to claim 16 , wherein an area of the opening ranges from 3% to 30% of an area of the lid portion.